I have the 15" K-Line Hiawatha set with the Skytop Lounge observation car. K-Line used generic ivory colored basic seats in the Skytop Lounge. I noticed what Santiago did with his lounge and so I did some research. I found photos of the actual interior. I noticed that there was a semi circular sofa at the very rear of the car. I made that myself from scrap.
Next, I noticed from the photos of the actual car that there were single seats and double seats and that they had arm rests. I found seats that were very close to the ones in the photo from Precision Scale Co. I bought their single seats- 41383 and their double seats- 41384.
In addition to seats, the actual interior had a table on either side of the car. The table is rounded in the front and is composed of several shelves spaced about 8" apart. I have ordered tongue depressors that are an actual 5/8" wide and I will construct the two tables from them.
The real car has table lamps on the tables. Keil Line 48-682 lamps will sit on top of the tables I make.
Finally, the Dell Rapids observation car had two floor standing ash trays for the smokers back in the day. I'll use two Keil Line 48-684 ash trays, one in the rear and one in the front of the car before the sleeping compartments.
I will also make a new floor from 1/16 styrene that I purchased off the net.
In addition to making a semi circular sofa, I primed the seats and I am getting ready to paint these items in Milwaukee maroon. I'll send photos later on.
John